PhonePe: Get Flat 50% Cashback On All Postpaid And DTH Recharge. Hello readers we have got another new offer for all of you. Now this time phonepe is having there first Cashback offer. So it’s the time to introduce there new phonepe app Cashback offer. This phonepe recharge offer is only valid for postpaid recharge and DTH bill payment. There’s a bit of problem that you need to pay the amount only from your bank account via UPI. Do not worry using UPI is very simple as well as easy task. You can get a maximum Cashback of rs80. So do not complain if you not get more than Rs 80.